APA
(1999). World clean energy buyers guide & directory 2001 : a complete buyers guide to clean energy products & services worldwide. Bangalore: Unisun Technologies.
Chicago
1999. World clean energy buyers guide & directory 2001 : a complete buyers guide to clean energy products & services worldwide. Bangalore: Unisun Technologies.
Harvard
(1999). World clean energy buyers guide & directory 2001 : a complete buyers guide to clean energy products & services worldwide. Bangalore: Unisun Technologies.
MLA
World clean energy buyers guide & directory 2001 : a complete buyers guide to clean energy products & services worldwide. Bangalore: Unisun Technologies. 1999.